Abstract
In the present study, a new model of Savonius wind turbine has been designed to increase the low performance of the Savonius wind rotor, a type of vertical-axis wind rotor, and the effect of wind speed on the static rotor performance has been analyzed numerically using solid-work flow simulation (SWFS). SWFS is based on the Reynolds Averaged Navier-Stokes (RANS) equations with the standard k-e turbulence model. These equations were solved by a finite volume discretization method. Further, the effects of rotor geometries and end plate on static torque are also discussed. In order to clarify the new designed of the rotor, static torque was measured with various blade sizes and end plate shape. From the study, found that the use of both upper and lower end plats significantly increase the torque by 40% compared with no end plates. Additionally, it was also observed that the torque of rotors increases proportionally to blade size and end plate shapes. Moreover, the results showed that model 2 has produced more torque compared to other models.
Highlights
The Savonius rotor is a novel fluid mechanical device that has been studied by numerous investigators since the 1920s
The characteristic performance of two and three bucket Savonius rotor has been carried out in wind tunnel tests, field experiments and numerical studies to evaluate the effect of aspect ratio, blades overlap and gap, effect of adding end extensions, end plates and shielding. [6,7,8,9]
Bhaskar and Gaurav [10] made numerical analysis using (computational fluid dynamic (CFD) software ANSYSFLUENT) on a two-Bladed Savonius Rotor, a study on drag and torque coefficient curves at different rotor blade angles at each 10° interval was carried out
Summary
The Savonius rotor is a novel fluid mechanical device that has been studied by numerous investigators since the 1920s. Bhaskar and Gaurav [10] made numerical analysis using (computational fluid dynamic (CFD) software ANSYSFLUENT) on a two-Bladed Savonius Rotor, a study on drag and torque coefficient curves at different rotor blade angles at each 10° interval was carried out. [7] experimentally studied the effect of end plates with various shapes and size on the aerodynamic performance of helical Savonius wind turbine with twist angle and two semi-circular buckets. This study aims to numerically investigate double semicylindrical blade and end plate effects using various shapes and sizes of blades and end plates on the aerodynamic performance of the Savonius wind turbine. This is the first study to conduct such an investigation
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